DG441DJZ - Quad SPST NC 85Ohm Analog Switch | Renesas
MPN: DG441DJZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.12 | $8.12 |
| 10 | $7.31 | $73.10 |
| 100 | $6.52 | $652.00 |
| 500 | $5.85 | $2,925.00 |
| 1,000 | $5.24 | $5,240.00 |
DG441DJZ Overview
An analog switch is a semiconductor device that routes or blocks analog signal paths under digital control, sitting within the broader hierarchy of signal-switching devices: analog switch, multiplexer/demultiplexer family, and interface ICs. Quad SPST switches are favored where independent, per-channel on/off control of four signal lines is needed without combining channels into a common bus, as a conventional multiplexer would require.
Key features of the DG441DJZ include four independently addressable normally-closed switches, 85 ohm guaranteed maximum on-resistance, TTL and CMOS logic compatibility across the full supply range, and drop-in compatibility with the popular DG201A and DG202 series devices. The DJZ suffix denotes the industrial temperature grade in a 16-pin plastic DIP package, supporting through-hole assembly for industrial and instrumentation designs.
Architecturally, the DG441 family uses monolithic CMOS construction that conducts equally well in either signal direction, allowing bidirectional signal flow. An internal voltage reference stabilizes logic thresholds against supply variation, keeping switching thresholds deterministic when driven by TTL or CMOS logic over the specified operating range.
Typical applications include precision test and measurement signal routing, industrial programmable logic controller (PLC) analog front ends, audio and video signal switching, sample-and-hold circuits, and communication equipment relay replacement where solid-state switching improves reliability and eliminates contact bounce.
When designing with the DG441DJZ, observe supply sequencing and ensure signal swings stay within the supply rails to prevent latch-up; the normally-closed configuration means channels conduct at power-off logic states, which must be considered in fail-safe designs.
This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DG441DJZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
DG442DJZ
β Drop-Inπ Reference alternative (not in catalog)
DG441DJ
β Drop-Inπ Reference alternative (not in catalog)
DG441CJ+
β Drop-Inπ Reference alternative (not in catalog)
DG442CJ+
β Drop-Inπ Reference alternative (not in catalog)
DG201AJZ
β Drop-Inπ Reference alternative (not in catalog)
DG441DJZ Maximum Ratings & Electrical Characteristics
| Switch Configuration | Quad SPST, Normally Closed |
| Number of Channels | 4 |
| On-Resistance (Max) | 85 ohm |
| Supply Voltage Range | 5 V to 34 V (total supply) |
| Typical Supply | +/-15 V |
| Logic Compatibility | TTL and CMOS |
| Signal Direction | Bidirectional |
| Internal Voltage Reference | Yes (for logic thresholds) |
| Package | 16-PDIP |
| Mounting Type | Through Hole |
| Drop-In Replacement For | DG201A / DG202 series |
DG441DJZ Pin Configuration
| Pin 1 | V+ β Positive analog supply |
| Pin 2 | V- β Negative analog supply |
| Pin 3 | VL β Logic supply / voltage reference input for logic thresholds |
| Pin 4 | GND β Ground |
| Pin 5 | IN1 β Logic control input, switch 1 |
| Pin 6 | S1 β Source terminal, switch 1 |
| Pin 7 | D1 β Drain terminal, switch 1 |
| Pin 8 | D2 β Drain terminal, switch 2 |
| Pin 9 | S2 β Source terminal, switch 2 |
| Pin 10 | IN2 β Logic control input, switch 2 |
| Pin 11 | IN3 β Logic control input, switch 3 |
| Pin 12 | S3 β Source terminal, switch 3 |
| Pin 13 | D3 β Drain terminal, switch 3 |
| Pin 14 | D4 β Drain terminal, switch 4 |
| Pin 15 | S4 β Source terminal, switch 4 |
| Pin 16 | IN4 β Logic control input, switch 4 |
Typical Applications
DG441DJZ is suitable for 6 applications: Test and Measurement Signal Routing, Industrial PLC Analog Front Ends, Audio and Video Signal Switching, Sample-and-Hold and Precision Circuits, Relay Replacement in Communication Equipment, Battery-Powered and Portable Instrumentation.
Test and Measurement Signal Routing
In bench instruments, automated test equipment (ATE), and data acquisition front ends, the DG441DJZ routes analog signals between measurement nodes without electromechanical relays. Its four independently controlled SPST channels allow a microcontroller to connect or disconnect four sensor or DUT nodes individually, and the 85 ohm on-resistance introduces predictable series impedance that is easily calibrated out. The TTL/CMOS compatible inputs with internal threshold reference let 5V or 3.3V-adjacent control logic switch +/-15V analog rails directly. Because the channels are normally closed, a control-failure fault leaves the measurement path connected, which is the preferred fail-safe behavior in many instrumentation designs; systems needing default-open paths should use the DG442.
Recommended
Industrial PLC Analog Front Ends
Programmable logic controllers (PLCs) and industrial process-control systems switch analog sensor inputs (4-20mA shunts, thermocouple lines, potentiometer feedback) under digital control. The DG441DJZ fits this role because its 5V to 34V total supply range tolerates the +/-15V analog rails common in industrial I/O cards, and the DJZ industrial temperature grade covers extended factory-floor ambient conditions. The 16-pin PDIP through-hole package supports field-serviceable, wave-soldered boards typical of industrial hardware. The monolithic CMOS switch conducts bidirectionally, so signal polarity reversals from sensors do not damage or misroute signals, and the internal logic threshold reference keeps switch behavior stable as the 24V-derived supplies vary with load.
Recommended
Audio and Video Signal Switching
In audio mixers, preamplifier source selectors, and video crosspoint subcircuits, the DG441DJZ switches line-level signals with the bidirectional CMOS path ensuring equal performance for signals entering either port. With an 85 ohm on-resistance against typical 10k ohm or higher audio loads, insertion loss is under 1%, and the absence of relay contacts eliminates audible switching transients from contact bounce. The normally-closed configuration is valuable for fail-through audio routing: if logic power is lost, audio passes to the default path. Operating the switch on +/-15V rails provides ample headroom so line-level signals (up to roughly +/-13V peak) never approach the rail limits that cause distortion, preserving low THD in the switched signal path.
Recommended
Sample-and-Hold and Precision Circuits
Sample-and-hold front ends for ADCs use SPST switches to connect a buffer output to a hold capacitor during the acquisition window. The DG441DJZ's normally-closed behavior means the track mode is the default state and logic applies only to hold, minimizing logic-induced charge injection on the critical node during tracking. Its bidirectional conduction simplifies bootstrap topologies, and the 34V total supply allows symmetric +/-15V operation so bipolar sample signals switch cleanly. Designers should account for the 85 ohm on-resistance in the RC acquisition-time constant: with a 1nF hold capacitor, the worst-case series resistance contributes roughly 85ns to acquisition time, which is negligible for most instrumentation conversion rates but relevant for high-speed designs.
Recommended
Relay Replacement in Communication Equipment
Telecom and RF-path control boards historically used small signal relays for antenna, line, or filter bank selection. The DG441DJZ replaces these relays as a solid-state alternative, eliminating contact bounce, coil drive circuitry, and the primary wear-out mechanism in relay-based designs. Four independent SPST channels in one 16-pin PDIP replace up to four relay poles, cutting board area and BOM count. The TTL/CMOS compatible inputs interface directly with the system controller, and operation from +/-15V rails covers wide-swing analog lines. Engineers must respect the 85 ohm series resistance when replacing relay contacts in low-impedance paths, and confirm that signal swings remain within the supply rails, as CMOS switches cannot pass signals beyond their supplies.
Recommended
Battery-Powered and Portable Instrumentation
Portable instruments use analog switches to disconnect sensors and signal chains from battery rails between measurements. The DG441DJZ can serve this role in designs retaining +/-15V-generated rails, with the four-channel density reducing component count in battery-powered layouts. The normally-closed configuration suits designs where the sensor must remain connected at power-down for diagnostics; when a battery-Disco default-open function is required, the pin-compatible DG442DJZ provides the normally-open complement so one PCB layout supports both polarities. Designers should minimize logic drive capacitance at the switch inputs to reduce switching transients coupling into sensitive analog nodes, and should verify off-leakage specifications against the sensor source impedance to avoid measurement error at high impedance nodes.
Recommended
Recommended Products Summary
Engineering reference data for DG441DJZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DG442DJZ | DG441DJ | DG441CJ+ | DG442CJ+ | DG201AJZ |
|---|---|---|---|---|---|---|
| Package | 16-PDIP | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Analog Devices (Maxim redesign) | Analog Devices (Maxim redesign) | Renesas Electronics |
| Switch Configuration | Quad SPST, Normally Closed | Quad SPST, Normally Open | Quad SPST, Normally Closed | Quad SPST, Normally Closed | Quad SPST, Normally Open | Quad SPST (DG441 drop-in equivalent) |
| Logic Compatibility | TTL and CMOS | TTL and CMOS | TTL and CMOS | TTL and CMOS | TTL and CMOS | TTL and CMOS |
| Temperature Grade | Industrial (DJ) | Industrial (DJ) | Commercial (J) | Commercial (CJ) | Commercial (CJ) | Industrial (DJ) |
Key Differentiators
- Normally-closed fail-safe behavior (vs DG442DJZ)
- Industrial temperature grade in PDIP (vs DG441DJ)
- Legacy drop-in migration path (vs DG201AJZ)
- Cost-effective general routing vs precision matching (vs DG441CJ+)
Design Notes
Operate the DG441DJZ from symmetric +/-15V rails within the 5V to 34V total supply range, and ensure the VL logic-reference pin is tied to a stable logic supply (typically +5V) so TTL/CMOS input thresholds remain deterministic. Estimated: with a 10k ohm load and 85 ohm on-resistance, the switch drops roughly 0.84% of the signal, so signal-path error is calibration-correctable. Analog signal swings must remain inside the V+ to V- rails at all times, including during power-up, to prevent substrate conduction and latch-up.
Place 0.1uF ceramic decoupling capacitors directly across V+ to GND and V- to GND, and a separate 0.1uF on VL, as close to the pins as possible. Because the four SPST channels share one die, switching one channel injects transient charge that can couple into neighboring channels; route sensitive analog traces away from other channels' IN pins and add ground guard traces between the S/D pin routing of high-impedance nodes. On through-hole PDIP boards, keep analog node traces short to limit pickup.
The most common substitution error is ignoring switch polarity: the DG441 is normally closed while the DG442 is normally open, yet both share the identical 16-pin pinout. Swapping them inverts the default logic state of every channel. Also, the DG441 family is a drop-in replacement for DG201A/DG202 series, but the reverse substitution to a legacy part must be checked against the original device's polarity and specifications. Finally, remember CMOS switches cannot pass signals outside the supply rails, unlike dry-reed relay contacts.
Compliance Information
Compliance status not stated in the provided web data; verify on the Renesas product page. AEC-Q100 not applicable - this is an industrial/commercial analog switch, not automotive-qualified.
